Vat dye.



,UNITED STATES BgENT OFFICE.

JOSEPH DEINET, OF ELBERFELD, GERMANY, ASSIGNOR T0 FAR'BENFABRIKEN VORM. FBIEDR. BAYER & 00., OF ELBEBFELD, GERMANY, A CORPORATION 01 GERMANY.

VAT DYE.

Specification of Letters Patent.

No Drawing. Application filed May 15, 1909, Serial No. 496,111. Renewed March 18, 1910. Serial No.

To all whom it may concern:

Be it known that I, JOSEPH DEINET, a citizen of the German Empire, residing at- Elberfeld, Germany, have invented new and useful Improvements in New Vat. Dyes of which the following is a specification.

My invention relates to the production of a new anthraoene derivative. Itis obtained by converting 1-mninoA-methoxyanthraqninone into its monolienzoylated derivative. The reaction is carried out by treating 1-amino-*l-methoxyantlzraqninone with benzoyl (rhlorid.

Example: 10 parts of l amino -1- metlr oxyant-hraquinone are heated to 100 C. for about. half an hour with 100 parts of nitrobenzene and :20 parts of beuzoyl chlOIld. The new eondensatirm product crystallizes from the cooling liquid in the shape of orange red needles which are filtered off and dried. It is soluble in pyridin with a yellow color, in concentrated sulfuric acid with a brown color. By treatment with hydrosnlfite and NaOH an orange vat is obtained which dyes cotton, wool or silk poneeau-red shades.

I claim:

The. herein described new vat dyestufi' of the anthracene series which is the l-benzoylmninoi-methoxyanthraqninone, which lives-lull is. after being dried and pulverized, an orange red powder which is soluble in pryridin with a yellow color; soluble in concentrated sulfuric acid with a brown color; giving an orange vat with hydrosnlfit-e and caustic soda lye, which vat dyes the textile lllk'l beautiful ponceau-red shades, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing \vlti'iesses.

JOSEPH DETNET. [as] \Yitnesses:

O'r'ro Kt'mm, C. J. VRIGHT. 

